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This polio survivor is one of the last still using an iron lung ... - NPR
The Iron Lung - Science Museum
What Is an Iron Lung, and How Does It Work? - Discover Magazine
The use of iron lungs as treatment for polio
The man in the iron lung: How Paul Alexander lived life to the full - BBC
Iron lungs for polio victims, 1930s-1950s - Rare Historical Photos
Iron lung | Description, History, & Polio | Britannica
Man in an iron lung since age 6 dies at 78 : NPR
How the iron lung paved the way for the modern-day intensive care ... - BBC
Lifesaving Breath - Harvard Medical School